I have a simple PSD with one layer, and in the layer I have a 'gradient overlay' effect which modifies the object. It's a very specific effect where it looks like separating the gradient into a second layer and applying layer masking is not an option with the specific look I'm after, so I'm quite sure I'm stuck with the 'gradient overlay' effect being the the element I need to 'animate'.
I want to move it from left to right in the animation timeline, pixel by pixel per frame, and the gradient is structured so that it becomes the same when it reaches the end point as at the beginning, so I can loop it seamlessly as the smooth effect I want.
I can see in this tutorial how, manually, when in the layer effects window I can drag the overlay effect to the right as a one-time modification to the layer. So, one painstaking way to do it would be to create about 60 duplicate frames and in each one, go to the gradient overlay layer style window, and do this dragging ever so slightly to the right - one pixel at a time.
But this is mighty painstaking, and it would be good to know, whether in Photoshop, an automatic/mechanized way of moving the overlay effect is possible (with the provided animation motion effects).
Thanks for your knowledge.